Punching bag



FIG. 1 is a front elevational view of a punching bag showing my new design;

FIG. 2 is a left side elevational view, taken in the direction of arrow 2 of FIG. 6, the right side elevational view being a mirror image thereof;

FIG. 3 is a rear elevational view thereof, taken in the direction of arrow 3 of FIG. 2;

FIG. 4 is a top plan view thereof, taken in the direction of arrow 4 of FIG. 6;

FIG. 5 is a bottom plan view thereof, taken in the direction of arrow of FIG. 6; and,

FIG. 6 is a front elevational view thereof, identical to FIG. 1 and included for the directional arrows.

The broken lines environment is for illustrative purpose only and form no part of the claimed design. 

CLAIM The ornamental design for a punching bag, as shown and described. 